help

shooterrob · 06-29-2009, 10:22 AM

I have a new 2009 corolla xrs Ijust want to know if anyone else has a 2009 with the same problem.when I'm driving the car if I have to stop in a hurry if you get on the brake a little hard the car jumps out of gear an its an auto and when you come to a stop it jumps back in the dealer says this is a safety issue but when this kicks back in its like being at the bumper cars and getting hit from behind this doesn't seem right,can anyone else confirm this with there car thanks any help would be great

jdmccright · 07-09-2009, 04:21 PM

I'd definitely have it looked at under warranty. I'd also ask to drive another similar car to see how it SHOULD behave.

Typically when you are driving and let off the throttle completely, only the fuel is cut off. The engine and transmission should continue to remain connected, though if you are in overdrive the torque converter lock-up may disengage. Your engine RPMs may drop some but not all the way down to idle speed because of the engine braking feature. Once you come to a stop (or slow enough to approach the engine's idle RPMs, the ECM will start to feed gas to keep the engine running at idle speed so that the engine doesn't stall.

During all of this, the transmission should be changing the gears to match the vehicle's speed...all unbeknownst to you since the torque converter is the buffer between the engine and the tranny, allowing the slippage needed to make all the gear changes smooth while the car decelerates.

What it sounds like to me is the torque converter is having trouble locking and unlocking. Have the dealer look at it...it may just need a reprogramming, but it definitely sounds like a warranty issue. Good luck!

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